<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Working with Tracks</title>
  <style>
    #player, #info {
      float: left;
    }
  </style>
  <script>
    function initiate() {
      const info = document.getElementById("info");
      const mytrack = document.getElementById("mytrack");
      const obj = mytrack.track;

      let list = "";
      list += "<br>Kind: " + obj.kind;
      list += "<br>Label: " + obj.label;
      list += "<br>Language: " + obj.language;
      info.innerHTML = list;
    }
    window.addEventListener("DOMContentLoaded", initiate);
  </script>
</head>
<body>
  <section id="player">
    <video id="media" width="720" height="400" controls>
      <source src="trailer.mp4" type="video/mp4">
      <source src="trailer.webm" type="video/webm">
      <track id="mytrack" label="English Subtitles" src="subtitles.vtt" srclang="en" default>
    </video>
  </section>
  <aside id="info"></aside>
</body>
</html>